Lycoming 37A19773M396 Alternator Drive Belt is a replacement engine accessory drive component designed for use on compatible Lycoming aircraft piston engines. The belt provides mechanical power transfer from the engine to the alternator, allowing the aircraft charging system to generate electrical power during engine operation.

The alternator drive belt is a critical component of the engine accessory system, transmitting rotational movement while maintaining proper alternator speed and alignment. Reliable belt operation ensures consistent alternator performance, supporting electrical power supply for aircraft systems, avionics, lighting, and other onboard equipment.

Manufactured for aviation engine applications, the 37A19773M396 belt is designed to operate under continuous vibration, temperature variations, and mechanical loading conditions found in aircraft engine compartments. Proper belt tension and condition are essential for efficient power transmission and prevention of premature wear or slippage.

The alternator drive belt should be inspected during scheduled maintenance for signs of cracking, fraying, glazing, stretching, or improper tension. Replacement at recommended service intervals helps maintain reliable charging system operation and supports continued aircraft airworthiness.

Key Features

- Part Number: 37A19773M396
- Manufacturer: Lycoming Engines
- Component: Alternator Drive Belt
- Transfers mechanical power from the engine to the alternator
- Supports reliable aircraft electrical system operation
- Designed for engine vibration, temperature changes, and continuous operation
- Requires proper inspection for wear, tension, and belt condition
- Suitable for compatible Lycoming aircraft engine installations